Mercurial > hg > nginx
view src/os/unix/ngx_send.c @ 4665:25611746fee7 stable-1.2
Merge of r4619: accept moderation on EMFILE/ENFILE.
In case of EMFILE/ENFILE returned from accept() we disable accept events,
and (in case of no accept mutex used) arm timer to re-enable them later.
With accept mutex we just drop it, and rely on normal accept mutex handling
to re-enable accept events once it's acquired again.
As we now handle errors in question, logging level was changed to "crit"
(instead of "alert" used for unknown errors).
Note: the code might call ngx_enable_accept_events() multiple times if
there are many listen sockets. The ngx_enable_accept_events() function was
modified to check if connection is already active (via c->read->active) and
skip it then, thus making multiple calls safe.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 04 Jun 2012 11:10:36 +0000 |
parents | d620f497c50f |
children | f01ab2dbcfdc |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> ssize_t ngx_unix_send(ngx_connection_t *c, u_char *buf, size_t size) { ssize_t n; ngx_err_t err; ngx_event_t *wev; wev = c->write; #if (NGX_HAVE_KQUEUE) if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) { (void) ngx_connection_error(c, wev->kq_errno, "kevent() reported about an closed connection"); wev->error = 1; return NGX_ERROR; } #endif for ( ;; ) { n = send(c->fd, buf, size, 0); ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, "send: fd:%d %d of %d", c->fd, n, size); if (n > 0) { if (n < (ssize_t) size) { wev->ready = 0; } c->sent += n; return n; } err = ngx_socket_errno; if (n == 0) { ngx_log_error(NGX_LOG_ALERT, c->log, err, "send() returned zero"); wev->ready = 0; return n; } if (err == NGX_EAGAIN || err == NGX_EINTR) { wev->ready = 0; ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, "send() not ready"); if (err == NGX_EAGAIN) { return NGX_AGAIN; } } else { wev->error = 1; (void) ngx_connection_error(c, err, "send() failed"); return NGX_ERROR; } } }